Rick Rescorla - A true American hero (from Britain). Led a Bayonet Charge in Vietnam. Was Killed in the Twin Towers, 9/11. His Remains Were Never Found - https://www.warhistoryonline.com/vietnam-war/rick-rescorla-a-true-american-hero-from-britain-led-a-bayonet-charge-in-vietnam-was-killed-in-the-twin-towers-911-his-remains-were-never-found.html
As the director of security for the financial services firm Morgan Stanley at the World Trade Center, Rescorla anticipated both attacks on the towers and implemented evacuation procedures credited with saving many lives. He died in the aftermath of the attacks of September 11, 2001, while leading evacuees from the South Tower.